Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 31)

PC NC Maintenance Manual Chapter 4: Troubleshooting
4-10
(18) Alarm Number 3321 to 3325 (Regeneration Error)
Contact your Yaskawa customer service representative after
checking the following:
• Whether the alarm occurs immediately after the control
power is turned ON.
• Whether the alarm occurs after turning ON the main
power.
(19) Alarm Numbers 3331 to 3335 (Over Voltage)
Contact your Yaskawa customer service representative after
checking the following:
• Whether the alarm occurs at the start of motor rotation.
• Whether the alarm occurs during deceleration.
(20) Alarm No.: 3341 to 3345 (Under Voltage)
Contact your Yaskawa customer service representative after
checking the following:
• Whether the alarm occurs after turning ON the main
power.
(21) Alarm Numbers 3351 to 3355 (Heat Sink Overheat)
Table 4.10: Troubleshooting - Alarm # 3351 ~ 3355 (Heat Sink Overheat)
Cause Check Item Countermeasures
Faulty control board Check whether the alarm occurs imme-
diately after the control power is turned
ON. Contact your Yaskawa
representative.
Fan stop Check whether the alarm occurs during
operation (alarm recurs if the control
power is turned ON after turning it OFF
once, or the operation restarts when the
NC is reset after several minutes.)
Check whether the fan is rotating. Contact your Yaskawa
customer service repre-
sentative.